CVE-2025-9871
📋 TL;DR
A local privilege escalation vulnerability in Razer Synapse 3's Chroma Connect SDK installer allows attackers to delete arbitrary files via symbolic link manipulation. This enables SYSTEM-level code execution on Windows systems where Razer Synapse 3 is installed. Only users with local low-privileged access can exploit this vulnerability.
💻 Affected Systems
- Razer Synapse 3
📦 What is this software?
Synapse by Razer
⚠️ Risk & Real-World Impact
Worst Case
Full SYSTEM compromise leading to complete host takeover, data destruction, persistence establishment, and lateral movement capabilities.
Likely Case
Local privilege escalation from standard user to SYSTEM, enabling installation of malware, credential theft, and bypassing security controls.
If Mitigated
Limited impact if proper endpoint protection, file integrity monitoring, and least privilege principles are enforced.
🎯 Exploit Status
Requires local low-privileged access first. Symbolic link creation and timing the installer execution are needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Razer Synapse 3 updates via Razer Central
Vendor Advisory: https://www.razer.com/razer-synapse-3
Restart Required: Yes
Instructions:
1. Open Razer Synapse 3. 2. Check for updates in settings. 3. Install latest version. 4. Restart system.
🔧 Temporary Workarounds
Disable Razer Synapse 3
windowsUninstall or disable Razer Synapse 3 if not needed
Control Panel > Programs > Uninstall Razer Synapse 3
Restrict symbolic link creation
windowsUse Group Policy to restrict who can create symbolic links
gpedit.msc > Computer Configuration > Windows Settings > Security Settings > Local Policies > User Rights Assignment > Create symbolic links
🧯 If You Can't Patch
- Remove Razer Synapse 3 from critical systems
- Implement application whitelisting to block Razer Synapse 3 execution
🔍 How to Verify
Check if Vulnerable:
Check Razer Synapse 3 version and ensure it's updated to latest. Vulnerable if using older versions with Chroma SDK.Check Version:
Open Razer Synapse 3 > Settings > About to check versionVerify Fix Applied:
Verify Razer Synapse 3 is updated to latest version via Razer Central and no longer uses vulnerable Chroma SDK installer.📡 Detection & Monitoring
Log Indicators:
- Windows Event Logs showing Razer Synapse installer activity with symbolic link operations
- Process creation logs for Razer installer with unusual file paths
Network Indicators:
- No network indicators - local vulnerability only
SIEM Query:
ProcessName="Razer*Installer*" AND FilePath="*\??\*" OR FilePath="*symlink*"